pseudocode/operators/PAD.tosac

//
// This confidential and proprietary software may be used only as
// authorised by a licensing agreement from ARM Limited
// (C) COPYRIGHT 2020-2024 ARM Limited
// ALL RIGHTS RESERVED
// The entire notice above must be reproduced on all authorised
// copies and copies may only be made to the extent permitted
// by a licensing agreement from ARM Limited.

// Check output shape matches the padded input shape
ERROR_IF(rank(shape) != rank(shape1));
for (i = 0; i < rank(shape); i++) {
    ERROR_IF(padding[i * 2] < 0 || padding[(i * 2) + 1] < 0);
    ERROR_IF(shape[i] != padding[i * 2] + shape1[i] + padding[(i * 2) + 1]);
}
for_each(index in shape) {
    shape_t index1 = index;
    bool_t is_pad = false;
    for(i = 0; i < rank(shape); i++) {
        index1[i] = index1[i] - padding[i * 2];
        if (index1[i] < 0 || index[i] >= length(shape[i])) {
            is_pad = true;
        }
    }
    in_out_t value = is_pad ? pad_const : tensor_read<in_out_t>(input1, shape1, index1);
    tensor_write<in_out_t>(output, shape, index, value);
}